Lagrange Error Bound for Taylor Polynomials - AP Calculus BC

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Question

Let be the fifth-degree Taylor polynomial approximation for , centered at .

What is the Lagrange error of the polynomial approximation to ?

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Answer

The fifth degree Taylor polynomial approximating centered at is:

The Lagrange error is the absolute value of the next term in the sequence, which is equal to .

We need only evaluate this at and thus we obtain

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